COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 3, Problem 22QAP
To determine
A zookeeper is trying to shoot a monkey at the top of the tree using tranquilizer gun. Find where should the zookeeper aim if he wants to hit the monkey.
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What do you need in order to determine the initial velocity of a projectile fired horizontally?
2. Which of the following statements is NOT true regarding projectile motion?
a)
The range of a projectile is proportional to
the square of the initial velocity.
c) As mass increases, the deflection of a
projectile due to air resistance decreases.
b) Air resistance affects the horizontal
acceleration of the projectile, but not the
vertical.
d) The range of a projectile is maximized when
launched at an initial angle of 45 degrees.
5. Is the sum of the magnitudes of two vectors always equal to the magnitude of the sum of the
same two vectors? If yes, why? If not, give a counter example.
Chapter 3 Solutions
COLLEGE PHYSICS
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- A Strong wind blows to the west at a speed of 38.7 mph relative to the ground causing a commercial plane to change course. What should be the plane's velocity in order to maintain a southward direction at a constant speed of 452 mph relative to the ground? A soccer ball is kicked at an angle of 35 degrees and gained an initial velocity of 40 m/s. a) determine the velocity along x. b) determine the range of the projectile.c) determine the maximum height the ball will reach. d) determine the total time of flighte) determine the x and y position and velocity at t=1.5 s.arrow_forward6) A projectile is fired at an inclination of 45° to the horizontal, with a muzzle velocity of 100 -32x? feet per second. The height h of the projectile is modeled by h(x) = + x where x 1002 is the horizontal distance of the projectile from the firing point. a. At what horizontal distance from the firing point is the height of the projectile a maximum? b. Find the maximum height of the projectile. c. At what horizontal distance from the firing point will the projectile strike the ground?arrow_forward1. A golf ball is hit from 4.3 m above a golfing fairway with an initial velocity of 30.0 m/s at an angle of 35° above the horizontal. a) Determine the time of flight for the ball. b) Determine the range for the golf ball. c) Determine the velocity for the golf ball the instant before the ball impacts the ground.arrow_forward
- 2.)Four balls were projected horizontally from the roof of a building. All factors involved are the same, but Ball A is projected at an angle of 20 degrees from the horizontal, Ball B has an angle of 25 degrees, Ball C has an angle of 30 degrees and Ball D has an angle of 35 degrees. Which of the ball has the greatest value of its initial velocity in the y directionarrow_forwardWhich among the following statements is CORRECT? A.) The vertical component of the acceleration of a projectile is zero during the entire flight. B.)The vertical component of the velocity of a projectile remains contant during the entire flight. C.)The horizontal component of the velocity of a projectile remains contant during the entire flight. D.)The maximum height reached by a projectile does not depend on its initial speed.arrow_forward3.) A projectile is launced on an elevated target with an initial velocity of V° = 200 m/s in a direction making an angle of 30° from the horizontal. A. Determine the time of flight from A and B. B. Determine the range R. C. Determine the impact velocity at the target.arrow_forward
- A projectile is fired with an initial velocity of 140m/s at 30° above the horizontal. The range of the projectile is Select one: a. 1697m b. 1442m c. 1033m d. 1281marrow_forwardA projectile with a muzzle velocity of 550m/s is fired from a gun on top of a cliff 460m above sea level. If the projectile hits the ocean surface 49.200s after being fired, determine: a-the angle of elevation of the gun b-the range c- the highest point attained above the cliff do 460m h •Ocean Surfacearrow_forwardäbö 25 Q4) Let vector A = 2i+3j , vector B = %3D 2i-2j, and vector C = (-A) - (2B). (a) Write vector C in component form. (b) Draw a coordinate system and on it show the three vectors (A, B and C). (c) what are the magnitude and * ?direction of vector C ث إضافة ملف إرسال ! رجوعarrow_forward
- Four vectors have the following x-components: -99, 104,56.-33. What is the x-component of the resultant vector? A. 5 B. 223 C. 28 D. Cannot be determinedarrow_forward• A dolphin jumps with an initial velocity of 12.0 m>s at an angleof 40.0° above the horizontal. The dolphin passes through thecenter of a hoop before returning to the water. If the dolphin ismoving horizontally when it goes through the hoop, how highabove the water is the center of the hoop?arrow_forwardProblem For a projectile lunched with an initial velocity of v0 at an angle of θ (between 0 and 90o) , a) derive the general expression for maximum height hmax and the horizontal range R. b) For what value of θ gives the highest maximum height? Solution The components of v0 are expressed as follows: vinitial-x = v0cos(θ) vinitial-y = v0sin(θ) a) Let us first find the time it takes for the projectile to reach the maximum height. Using: vfinal-y = vinitial-y + ayt since the y-axis velocity of the projectile at the maximum height is vfinal-y = ? Then, ? = vinitial-y + ayt Substituting the expression of vinitial-y and ay = -g, results to the following: ? = ? - ?t Thus, the time to reach the maximum height is tmax-height = ?/? We will use this time to the equation yfinal - yinitial = vinitial-yt + (1/2)ayt2 if we use the time taken to reach the maximum height, therefore, the displacement will yield the maximum height, so hmax = vinitial-yt + (1/2)ayt2 substituting, the vinitial-y…arrow_forward
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